[lld] [llvm] [WebAssembly] Add segment NO_STRIP flag to support private retained data (PR #81539)

[Yuta Saito via llvm-commits]

================
@@ -56,21 +58,30 @@ void MarkLive::enqueue(Symbol *sym) {
   LLVM_DEBUG(dbgs() << "markLive: " << sym->getName() << "\n");
 
   InputFile *file = sym->getFile();
-  bool needInitFunctions = file && !file->isLive() && sym->isDefined();
+  bool needMarkImplicitDeps = file && !file->isLive() && sym->isDefined();
 
   sym->markLive();
 
-  // Mark ctor functions in the object that defines this symbol live.
-  // The ctor functions are all referenced by the synthetic callCtors
-  // function. However, this function does not contain relocations so we
-  // have to manually mark the ctors as live.
-  if (needInitFunctions)
+  if (needMarkImplicitDeps) {
+    // Mark ctor functions in the object that defines this symbol live.
+    // The ctor functions are all referenced by the synthetic callCtors
+    // function. However, this function does not contain relocations so we
+    // have to manually mark the ctors as live.
     enqueueInitFunctions(cast<ObjFile>(file));
+    // Mark retained segments in the object that defines this symbol live.
+    enqueueRetainedSegments(cast<ObjFile>(file));
+  }
 
   if (InputChunk *chunk = sym->getChunk())
     queue.push_back(chunk);
----------------
kateinoigakukun wrote:

`sym->markLive()` already marks those chunks as live, so we don't need to use the new `enqueue` here 

https://github.com/llvm/llvm-project/pull/81539